甲酰胺对有序介孔二氧化硅形貌的影响  

Effect of Formamide on the Morphologies of Ordered Mesoporous Silica

作　　者：党文修[1] 韩书华[1] 许军[1] 闫欣[1] 侯万国[1] 

机构地区：[1]山东大学胶体与界面化学教育部重点实验室

出　　处：《无机化学学报》2004年第6期679-682,共4页Chinese Journal of Inorganic Chemistry

基　　金：清华大学新型陶瓷与精细工艺国家重点实验室资助项目(No.KF0101)

摘　　要：O引言1992年Mobil的研究人员首先报道了在水热条件下以表面活性剂胶束为模板合成出孔道有序的M41S介孔分子筛[1],引起了在介孔材料的合成、表征、形成机理以及孔道修饰和应用方面的研究热潮[2,3].At room temperature and in acidic solution, ordered mesoporous silicas with particular morphology were synthesized using cetylpyridinium chloride as the template and formamide as the cosolvent. Scanning electron microscope (SEM), small angle X-ray diffraction (SXRD), and nitrogen adsorption techniques were used to characterize the as-synthesized and calcined samples. Results showed that the samples had hexagonal mesostructure analogous to MCM-41 and relatively narrow pore-size distributions (BJH). Besides, BET surface areas of the samples were in the range of 1000similar to1250 m(2).g(-1) and high total pore volumes were up to 1.367 cm(3).g(-1). Addition of formamide affected obviously mesostructures and the morphology of the mesoporous silica. Furthermore, with the increase of the concentration of formamide, the unit-cell constant decreased and particle shape changed from gyroids to fibers.

关 键 词：甲酰胺 二氧化硅 表面活性剂 胶束 介孔分子筛 介孔材料 

分 类 号：O613.72[理学—无机化学]